Relief-valve for suction or blast pipes.



No. 650,670. Patented May 29, I900.

H. L. DAY;

BELIEF VALVE FOR SUCTION 0B BLAST PIPES.

(Application filed Ailg. 7, 1899.) (No Model.)

b enry A, Day

M By

NITED STATES PATENT FFICE.

HENRY L. DAY, or MINNEAPOLIS, MINNESOTA.

RELIEF-VALVE FOR SUCTION OF? QLAST PIPES.

SPECIFICATION forming part of Letters Patent 0. 650,670, datedMay 29,1900.

Application filed August 7, 1899- To all whom it may concern:

Be it known that I, HENRY L. DAY, of Minneapolis, county of Hennepin,State of Minnesota, have invented certain new and useful Improvements inRelief-Valveslfor Suction or Blast Pipes, of which the following is aspecification. 1

My invention relates to relief-valves for use in connection with thesuction or blast pipes for conveying materialssuch as sawdust, shavings,or dust from machines in woodworking shops, elevators, or otherplaces-to storage-rooms or to boiler-furnaces or to other suitablereceptacles for such materials, and is designed as an improvement over asimilar device shown and described in Letters Patent of the UnitedStates No. 503,126, granted to me August 15, 1893.

The object of the invention is to provide a mechanism that is moresimple in construction than the device described in the abovenamedpatent and will therefore be easier and cheaper to manufacture, thoughaccomplishing substantially the same result.

The invention consists generally in avalve chamber or box having avalve, a main inletopening, and a divided outlet-openin g, incombination with an elbow or curved section of pipe whose wall acts asadefiector to direct a portion of the air and the heavier or coarsermaterial through one section of the valvechamber and permitthe surplusair and lighter material to pass through another section, and a fan orfans in connection with said pipe, all as hereinafter described, andparticularly pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure1 is a longitudinal section of the valve-box embodying my invention andthe pipe-section and fancasing with which said box is connected on theline y y of Fig. 2. Fig. 2 is a longitudinal section on the line was ofFig. 1.

In the drawings, 2 represents a fan, and 3 its casing, of any preferredsize and construction, and said fan may be located at any desireddistance from the relief-valve and in any preferred position to drawmaterial from wood-working machinery in the usual manner.

5 is the valve-chamber, arranged at any preferred point in theblast-pipe and liavin g an in- Serlal. No. 726,380. (No model-l near theinlet-opening to the valve-chamber I provide a curved pipe-section 4,Whose wall .acts as a deflector to divert the heavier ma terial that isthrown against it and direct the same, with a portion of the air-blast,into one.

section of the valve-chamber. Within said chamber I prefer to provide ahorizontal plate 10, centrally arranged and dividing said chamber intoan upper and lower compartment or passage, and on said plate I provide avalve 11, vertically pivoted on the rod 12 and operated by a crank 13.in Fig. 2, is pivoted, preferably, near the middle of the plate 10 andserves to divert the shavings and heavier material into either of thepipes 8 or 9, the material being directed into the space above saidplateby contact with the curved wall of said pipe-section, as heretoforedescribed. Should the valve 11 be parallel with the longitudinal axis ofsaid valvechamber, the heavier material will be distributed between thetwo pipes 8 and 9. Should the valve be in the position indicated in fulllines in Fig. 2, all of the heavier material will be directed into thepipe 9 or into the pipe 8 should the valve be in position indicated bydottedlines in said figure. While the heavier particles are beingdeflected from the curved surface of the section 4, a portion of theairblast and the lighter particles and dust held in suspension therebywill pass beneath the plate 10 and into the pipes 8 and 9.

. By providing a curved pipe or elbow in the blast-pipe at a point nearthe valve-chamber I utilize the curved wall as a deflector,and thusdispense with an independent plate for that purpose; but I do not wishto confine myself to any particular form or degree of the curvedsection, it being necessary simply to provide such an angle in the pipeto cause the heavier particles that are thrown against the wall of thepipe to be deflected to a point where they may be directed to afurnace-boiler or storage-bin, as preferred.

I have shown but one form of valve-chamber and arrangement of valvetherein; but

This valve, as shownobviously the position of the valve may be varied,according to the relative positions of the valve-chamber and the curvedsection of the blast-pipe, and while I have shown a single fan connectedwith the blast-pipe obviously two or more fans may be employed and thevalve-chamber located at any preferred distance from said fan and in anyp ref erred position with respect to said fan, and the various detailsof the valve-chamber, such as the means for operatingthe valve to itsposition in the chamber, may be varied by any one skilled in matterspertaining hereto, and

I therefore do not wish to confine myself to the specific constructionherein described.

Having thus described my invention, I claim as new and desire to secureby Letters Iatent:

1. The combination, with a valve-chamber having an inlet-opening anddivided outletopenings and a valve provided in said valvechamber, of acurved pipe-section provided in the blast-pipe near said inlet-opening,the wall of said section acting as a deflector to direct a portion ofthe air-blast, and the heavier materials thrown against it, to onesection of the valve-chamber while the surplus air and lighter materialpass to another section of the valve-chamber, and a fan or fans connected with said blast-pipe, substantially as described.

2. The combination, withavalve-chamber, having an inlet-openin g and adivided outletopening, means provided within said valvechamber fordirecting a portion of the airblast into either of said outlet-openings,a curved pi pe-section provided in the blast-pipe near saidvalve-chamber,the wall of said pipesection acting as a deflector todirect a portion of the air, and the heavier material carried thereby,which is thrown against said wall, to one section of said valve-chamberwhile permitting the surplus air and the lighter material to pass intoanother section, and a fan or fans provided in connection with saidblast-pipe, substantially as described. a '3. The combination, with avalve-chamber having inlet and outlet openings and pipes 8 and 9connected to said outlet-opening, of a plate 10 provided in saidchamber, a valve 11, means for operating the same, a curved pipe-sectionprovided in the blast-pipe near the inlet opening of said valve chamberwhereby when the air-blast passes through the same the heavier materialwill be thrown against the curved wall of said section and deflectedinto the space above said plate 10 to be directed by said valve intoeither of said outlet-pipes 8 or 9, while the surplus air and lightermaterial carried thereby pass through said chamber beneath said plate,substantially as described.

In witness whereof I have hereunto set my hand this llth day of April,1890.

HENRY L. DAY. In presence of RICHARD PAUL, M. O. NOONAN.

